Despite the absence of experimental evidence, TeV-scale supersymmetry remains one of the best-motivated and studied Standard Model extensions at the Large Hadron Collider. These proceedings summarise recent ATLAS results on inclusive searches for supersymmetric squarks and gluinos, including third-generation squarks produced in the decay of gluinos. The searches involve final states containing jets and missing transverse momentum, with and without light leptons or photons, and were performed with $pp$ collisions at a centre-of-mass energy of 13 TeV.